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Development of Single-Molecule Magnets

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Chinese Journal of Chemistry 2020年第9期38卷 1005-1018页

作者： dong shao Xin-Yi Wang State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced MicrostructuresSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjingJiangsu 210023China

Single-molecule magnets(SMMs)are paramagnetic molecules that can be magnetized below a certain temperature and have potential applications in high-density information storage,magnetic-qubits,spintronic devices,*** discovery of the first SMM,Mn12,opened a new era of molecular magnetism and promoted collaborative researches between chemists and physicists for their exotic quantum as well as classical magnetic *** the recent past,great efforts have been madefto develop strategies for constructing new SMMs with high energy barriers(Ueff)and blocking temperatures(Tb), resulting in great and fast development of *** this concise review,we highlight the main synthetic approaches and representative results in the design and synthesis of high *** hope to give the readers a basic understanding of SMMs and a snapshot of the representative researches on SMMs from a perspective of synthetic chemists.

关键词： properties. magnets constructing

Experimental study of non-uniform bubbles in a plume

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Journal of Hydrodynamics 2022年第1期34卷 116-124页

作者： Xin-wei Ye Hao-jie Zhou dong-dong shao Xiao-jing Niu State Key Laboratory of Hydroscience and Engineering Department of Hydraulic EngineeringTsinghua UniversityBeijing100084China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing100875China

The bubble plume is an important flow phenomenon, ubiquitous in many fields. The non-uniform bubbles in a plume are often simply considered as uniform and moving with a same slip velocity in an integral model. This study aims to have a better understanding of the behavior of the non-uniform bubbles in a plume. A set of experiments are conducted in a transparent water tank, in which the air plumes are generated through different injectors to vary the spectrum of the bubble size. The shadow images of the bubbles are simultaneously recorded with the illumination of a plane backlight. The algorithm used in the image analysis for tracing the bubbles is a newly developed multi-frame method based on the predictor-corrector method, with a good accuracy in estimating the size and the velocity of the overlapped bubbles based on the bubble shadow images. The bubbles are divided into several groups by their equivalent diameters with an interval of 0.5 mm. The spectrums of the bubble size and the void fraction are measured. It is found that the bubbles of different sizes show different dynamics features, resulting in a difference in the radial distribution. It is shown that the large bubbles gather in the center of the plume, while the medium bubbles spread the widest and even wider than the small bubbles. The difference can be explained by the effects of the transverse lift force and the amplitude of the bubble oscillation.

关键词： Bubble plume experiment image analysis bubble size transverse lift force

A New Approach for Controlling Chaos Based on Direct Optimizing Predictive Control

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Communications in Theoretical Physics 2006年第3期45卷 473-476页

作者： LI dong-Mei YANG shao-Zhen School of Economy and Management Hebei University of Science and Technology Shijiazhuang 050018 China

We introduce the predictive control theory into predictive control algorithm based on a neural network model the study of chaos control and propose a direct optimizing The proposed control system stabilizes the chaotic motion in an unknown chaotic system onto the desired target trajectory. Compared with the existing similar algorithms, the proposed control system has faster response, so it requires much shorter time for the stabilization of the chaotic systems. The proposed approach can control hyperchaos and the algorithm is simple. The convergence of the control algorithm and the stability of the control system can be guaranteed. The theoretic analysis and simulations demonstrate the effectiveness of the algorithm.

关键词： vchaos control predictive control chaotic system neural networks

In Silico Screening of Potential Chinese Herbal Medicine Against COVID-19 by Targeting SARS-CoV-2 3CLpro and Angiotensin Converting Enzyme Ⅱ Using Molecular Docking

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Chinese Journal of Integrative Medicine 2020年第7期26卷 527-532页

作者： GAO Liang-qin XU Jing CHEN shao-dong Department of Traditional Chinese Medicine Xiamen University HospitalXiamen UniversityXiamenFujian Provinee(361005)China College of Ocean and Earth Sciences Xiamen UniversityXiamenFujian Provinee(361102)China Department of Traditional Chinese Medicine School of MedicineXiamen UniversityXiamenFujian Provinee(361002)China

Objective:To seek potential Chinese herbal medicine(CHM)for the treatment of coronavirus disease 2019(COVID-19)through the molecular docking of the medicine with SARS-CoV-23 CL hydrolytic enzyme and the angiotensin converting enzymeⅡ(ACE2)as receptors,using computer virtual screening technique,so as to provide a basis for combination ***:The molecular docking of CHM with the SARS-Cov-23 CL hydrolase and the ACE2 converting enzyme,which were taken as the targets,was achieved by the Autodock Vina *** CHM monomers acting on 3 CLpro and ACE2 receptors were retrieved from the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform,the active ingredients were selected,and the key CHMs and compounds were *** on the perspective of network pharmacology,the chemical-target network was constructed,and the functional enrichment analysis of gene ontology and the pathway enrichment analysis of Kyoto encyclopedia of genes and genomes were carried out by DAVID to speculate about the mechanism of action of the core drug ***:There are6 small molecule compounds that have the optimal binding energy with the two target *** 238 potential anti-COVID-19 herbs screened in total,16 kinds of CHM containing the most active ingredients,and5 candidate anti-COVID-19 herbs that had been used in high frequency,as well as a core drug pair,namely,Forsythiae Fructus-Lonicerae Japonicae Flos were ***:The core drug pair of Forsythiae Fructus-Lonicerae Japonicae Flos containing multiple components and targets is easy to combine with 3 CLpro and ACE2,and exerts an anti-COVID-19 pneumonia effect through multi-component and multi-target,and plays the role of anti-COVID-19 pneumonia in multi-pathway.

关键词： molecular docking COVID-19 SARS-CoV-23CL hydrolytic enzyme angiotensin converting enzymeⅡ Chinese medicine

Reconstruction of 3-D surface waves generated by moving submerged sphere based on stereo imaging principle

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Journal of Hydrodynamics 2020年第1期32卷 139-147页

作者： Xin-long Wang Gang Wei Hui Du shao-dong Wang Department of Meteorology and Oceanography National University of Defense TechnologyNanjing 211101China

A sailing ship can produce significant disturbances on the water surface,but the perturbation generated by a moving submerged source is much smaller due to the physical property of the free surface,as represented by the rigid-lid assumption,with the geometric displacement barely observed or *** on the stereo imaging principle,an experimental system for the three-dimensional measurement of the surface perturbation is built by assembling two charge coupled device(CCD)sensors,to measure the surface waves generated by a small submerged sphere,including the small-scale vertical displacements and the flow field on the water *** obtained results are consistent with those obtained by the theoretical analysis,and the measurement accuracy for the vertical displacements is improved by 50%compared to that of the direct optical method based on the image grey ***,the present measurement technique can be efficiently and precisely applied to other measurements of small-scale disturbances on a free surface.

关键词： Surface wake stereo imaging geometric reconstruction particle image velocimetry(PIV)

The Phenomenon of Mutual Media in Polypyrrole with Electroactive Ions

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Chemical Research in Chinese Universities 1998年第2期14卷 39-44页

作者： YANG Chun-he dong shao-jun Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022

The dependence of the differential capacitance of polypyrrole doped with several typical dopants on potential is presented, which shows that the differential capacitance varies with the potential, the doped polypyrroles with electroactive ions give the largest capacitance near their formal potentials, which is attributed to the mutual media for electron transfer between polypyrrole and electroactive dopants. The existence of two conducting phases was observed in the complex capacitance plots. The electroactive anions act as an intraconductingphase medium for electron transfer, the electroactive cations act as an interconductingphase medium for electron transfer. The mutual media between polypyrrole and redox dopants lead to the increase of the discharging time.

关键词： AC impedance Polypyrrole Methylene blue

THE 1-LAPLACIAN CHEEGER CUT： THEORY AND ALGORITHMS

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Journal of Computational Mathematics 2015年第5期33卷 443-467页

作者： K.C. Chang Sihong shao dong Zhang LMAM and School of Mathematical Sciences Peking University Beijing 100871 China

This paper presents a detailed review of both theory and algorithms for the Cheeger cut based on the graph 1-Laplacian. In virtue of the cell structure of the feasible set, we propose a cell descend （CD） framework for achieving the Cheeger cut. While plugging the relaxation to guarantee the decrease of the objective value in the feasible set, from which both the inverse power （IP） method and the steepest descent （SD） method can also be recovered, we are able to get two specified CD methods. Comparisons of all these methods are conducted on several typical graphs.

关键词： Spectral graph theory Spectral clustering 1-Laplace operator Graph Lapla-cian Eigenvalue problems Cheeger constant Graph cut Optimization Convergence

Renal failure and hepatitis following ingestion of raw grass carp gallbladder:A case report

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World Journal of Clinical Cases 2021年第4期9卷 943-950页

作者： Li-Na Zhou shao-shao dong Sheng-Ze Zhang Wen Huang Department of Nephrology Wenzhou People's HospitalWenzhou 325000Zhejiang ProvinceChina Department of Nephrology The Second Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325000Zhejiang ProvinceChina

BACKGROUND Fish gallbladder has long been used as a folk remedy in Asian *** organ damage after ingestion of fish gallbladder resulting in near mortality has been known to ***,we describe a case of acute renal failure(ARF)and hepatitis due to grass carp gallbladder poisoning and review the *** SUMMARY A previously healthy,50-year-old woman was admitted to our hospital with a 2-d history of generalized abdominal pain and repeated vomiting following ingestion of two raw grass carp gallbladders in an attempt to alleviate her *** developed anuria on day 4 with markedly elevated serum creatinine,urea,bilirubin,alanine aminotransferase,and aspartate *** on thorough evaluation of her history and prompt biochemical investigations,we diagnosed her with ARF and hepatitis secondary to fish gallbladder *** renal biopsy revealed acute tubular necrosis,following which she underwent six sessions of conventional hemodialysis due to renal *** treatment with gastric mucosal protectant and liver protectant was administered for targeted organ *** patient’s liver function gradually recovered,and serum creatinine was 164 mmol/L at discharge on day *** a follow-up period of 2 wk,her renal function completely *** Physicians should be mindful of toxic complications of raw grass carp gallbladder ingestion and we should promote awareness to reduce incidences of food poisoning.

关键词： Grass carp gallbladder Case report Acute renal failure Hepatitis Ichthyogallotoxin Hemodialysis

A study of differential potentiometric stripping analysis for lead and cadmium with Nafion coated carbon fibre electrode

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Chinese Journal of Chemistry 1990年第6期8卷 507-511页

作者： dong shao-Tun HE Jun WANG Yu-dong Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryAcademia SinicaChangchun130022

The differential potentiometric stripping analysis (DPSA) with Nafion coated carbon fibre electrode has been studied, and a method to determine lead and cadmium in urine directly has been attempted. The effect of various experimental parameters on the DPSA response is discussed. The experimental conditions include 0.2M sodium perchlorate, deposition potential of-1.0 or -1.1 V and using 20 ppm mercuric ion as oxidizing agent. The response of the signal is in linear relation with the concentrations of lead and cadmium respectively up to 0.5 ppm. The electrode coated with Nafion film alleviates the interference from organics in urine samples.

关键词： A study of differential potentiometric stripping analysis for lead and cadmium with Nafion coated carbon fibre electrode